diff --git a/reference/image/functions/imagepsbbox.xml b/reference/image/functions/imagepsbbox.xml
index f766d17e82..98bf5b5f85 100644
--- a/reference/image/functions/imagepsbbox.xml
+++ b/reference/image/functions/imagepsbbox.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.9 $ -->
+<!-- $Revision: 1.10 $ -->
 <refentry id="function.imagepsbbox">
  <refnamediv>
   <refname>imagepsbbox</refname>
@@ -13,8 +13,8 @@
    <methodparam><type>int</type><parameter>font</parameter></methodparam>
    <methodparam><type>int</type><parameter>size</parameter></methodparam>
    <methodparam choice="opt"><type>int</type><parameter>space</parameter></methodparam>
-   <methodparam choice="opt"><type>int</type><parameter>tightness</parameter></methodparam>
-   <methodparam choice="opt"><type>float</type><parameter>angle</parameter></methodparam>
+   <methodparam><type>int</type><parameter>tightness</parameter></methodparam>
+   <methodparam><type>float</type><parameter>angle</parameter></methodparam>
   </methodsynopsis>
   <para>
    Gives the bounding box of a text rectangle using PostScript Type1 fonts.